diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/bootmem.c | 13 | ||||
| -rw-r--r-- | mm/memblock.c | 837 | ||||
| -rw-r--r-- | mm/page_alloc.c | 86 | ||||
| -rw-r--r-- | mm/sparse-vmemmap.c | 11 |
4 files changed, 631 insertions, 316 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c index 142c84a54993..13b0caa9793c 100644 --- a/mm/bootmem.c +++ b/mm/bootmem.c @@ -15,6 +15,7 @@ #include <linux/module.h> #include <linux/kmemleak.h> #include <linux/range.h> +#include <linux/memblock.h> #include <asm/bug.h> #include <asm/io.h> @@ -434,7 +435,8 @@ void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, unsigned long size) { #ifdef CONFIG_NO_BOOTMEM - free_early(physaddr, physaddr + size); + kmemleak_free_part(__va(physaddr), size); + memblock_x86_free_range(physaddr, physaddr + size); #else unsigned long start, end; @@ -459,7 +461,8 @@ void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, void __init free_bootmem(unsigned long addr, unsigned long size) { #ifdef CONFIG_NO_BOOTMEM - free_early(addr, addr + size); + kmemleak_free_part(__va(addr), size); + memblock_x86_free_range(addr, addr + size); #else unsigned long start, end; @@ -526,6 +529,12 @@ int __init reserve_bootmem(unsigned long addr, unsigned long size, } #ifndef CONFIG_NO_BOOTMEM +int __weak __init reserve_bootmem_generic(unsigned long phys, unsigned long len, + int flags) +{ + return reserve_bootmem(phys, len, flags); +} + static unsigned long __init align_idx(struct bootmem_data *bdata, unsigned long idx, unsigned long step) { diff --git a/mm/memblock.c b/mm/memblock.c index 43840b305ecb..400dc62697d7 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -11,237 +11,423 @@ */ #include <linux/kernel.h> +#include <linux/slab.h> #include <linux/init.h> #include <linux/bitops.h> +#include <linux/poison.h> +#include <linux/pfn.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> #include <linux/memblock.h> -#define MEMBLOCK_ALLOC_ANYWHERE 0 +struct memblock memblock __initdata_memblock; -struct memblock memblock; +int memblock_debug __initdata_memblock; +int memblock_can_resize __initdata_memblock; +static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS + 1] __initdata_memblock; +static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS + 1] __initdata_memblock; -static int memblock_debug; +/* inline so we don't get a warning when pr_debug is compiled out */ +static inline const char *memblock_type_name(struct memblock_type *type) +{ + if (type == &memblock.memory) + return "memory"; + else if (type == &memblock.reserved) + return "reserved"; + else + return "unknown"; +} -static int __init early_memblock(char *p) +/* + * Address comparison utilities + */ + +static phys_addr_t __init_memblock memblock_align_down(phys_addr_t addr, phys_addr_t size) { - if (p && strstr(p, "debug")) - memblock_debug = 1; + return addr & ~(size - 1); +} + +static phys_addr_t __init_memblock memblock_align_up(phys_addr_t addr, phys_addr_t size) +{ + return (addr + (size - 1)) & ~(size - 1); +} + +static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, + phys_addr_t base2, phys_addr_t size2) +{ + return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); +} + +static long __init_memblock memblock_addrs_adjacent(phys_addr_t base1, phys_addr_t size1, + phys_addr_t base2, phys_addr_t size2) +{ + if (base2 == base1 + size1) + return 1; + else if (base1 == base2 + size2) + return -1; + return 0; } -early_param("memblock", early_memblock); -static void memblock_dump(struct memblock_region *region, char *name) +static long __init_memblock memblock_regions_adjacent(struct memblock_type *type, + unsigned long r1, unsigned long r2) { - unsigned long long base, size; - int i; + phys_addr_t base1 = type->regions[r1].base; + phys_addr_t size1 = type->regions[r1].size; + phys_addr_t base2 = type->regions[r2].base; + phys_addr_t size2 = type->regions[r2].size; - pr_info(" %s.cnt = 0x%lx\n", name, region->cnt); + return memblock_addrs_adjacent(base1, size1, base2, size2); +} - for (i = 0; i < region->cnt; i++) { - base = region->region[i].base; - size = region->region[i].size; +long __init_memblock memblock_overlaps_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size) +{ + unsigned long i; - pr_info(" %s[0x%x]\t0x%016llx - 0x%016llx, 0x%llx bytes\n", - name, i, base, base + size - 1, size); + for (i = 0; i < type->cnt; i++) { + phys_addr_t rgnbase = type->regions[i].base; + phys_addr_t rgnsize = type->regions[i].size; + if (memblock_addrs_overlap(base, size, rgnbase, rgnsize)) + break; } + + return (i < type->cnt) ? i : -1; } -void memblock_dump_all(void) +/* + * Find, allocate, deallocate or reserve unreserved regions. All allocations + * are top-down. + */ + +static phys_addr_t __init_memblock memblock_find_region(phys_addr_t start, phys_addr_t end, + phys_addr_t size, phys_addr_t align) { - if (!memblock_debug) - return; + phys_addr_t base, res_base; + long j; - pr_info("MEMBLOCK configuration:\n"); - pr_info(" rmo_size = 0x%llx\n", (unsigned long long)memblock.rmo_size); - pr_info(" memory.size = 0x%llx\n", (unsigned long long)memblock.memory.size); + /* In case, huge size is requested */ + if (end < size) + return MEMBLOCK_ERROR; - memblock_dump(&memblock.memory, "memory"); - memblock_dump(&memblock.reserved, "reserved"); + base = memblock_align_down((end - size), align); + + /* Prevent allocations returning 0 as it's also used to + * indicate an allocation failure + */ + if (start == 0) + start = PAGE_SIZE; + + while (start <= base) { + j = memblock_overlaps_region(&memblock.reserved, base, size); + if (j < 0) + return base; + res_base = memblock.reserved.regions[j].base; + if (res_base < size) + break; + base = memblock_align_down(res_base - size, align); + } + + return MEMBLOCK_ERROR; } -static unsigned long memblock_addrs_overlap(u64 base1, u64 size1, u64 base2, - u64 size2) +static phys_addr_t __init_memblock memblock_find_base(phys_addr_t size, + phys_addr_t align, phys_addr_t start, phys_addr_t end) { - return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); + long i; + + BUG_ON(0 == size); + + size = memblock_align_up(size, align); + + /* Pump up max_addr */ + if (end == MEMBLOCK_ALLOC_ACCESSIBLE) + end = memblock.current_limit; + + /* We do a top-down search, this tends to limit memory + * fragmentation by keeping early boot allocs near the + * top of memory + */ + for (i = memblock.memory.cnt - 1; i >= 0; i--) { + phys_addr_t memblockbase = memblock.memory.regions[i].base; + phys_addr_t memblocksize = memblock.memory.regions[i].size; + phys_addr_t bottom, top, found; + + if (memblocksize < size) + continue; + if ((memblockbase + memblocksize) <= start) + break; + bottom = max(memblockbase, start); + top = min(memblockbase + memblocksize, end); + if (bottom >= top) + continue; + found = memblock_find_region(bottom, top, size, align); + if (found != MEMBLOCK_ERROR) + return found; + } + return MEMBLOCK_ERROR; } -static long memblock_addrs_adjacent(u64 base1, u64 size1, u64 base2, u64 size2) +/* + * Find a free area with specified alignment in a specific range. + */ +u64 __init_memblock memblock_find_in_range(u64 start, u64 end, u64 size, u64 align) { - if (base2 == base1 + size1) - return 1; - else if (base1 == base2 + size2) - return -1; + return memblock_find_base(size, align, start, end); +} - return 0; +/* + * Free memblock.reserved.regions + */ +int __init_memblock memblock_free_reserved_regions(void) +{ + if (memblock.reserved.regions == memblock_reserved_init_regions) + return 0; + + return memblock_free(__pa(memblock.reserved.regions), + sizeof(struct memblock_region) * memblock.reserved.max); } -static long memblock_regions_adjacent(struct memblock_region *rgn, - unsigned long r1, unsigned long r2) +/* + * Reserve memblock.reserved.regions + */ +int __init_memblock memblock_reserve_reserved_regions(void) { - u64 base1 = rgn->region[r1].base; - u64 size1 = rgn->region[r1].size; - u64 base2 = rgn->region[r2].base; - u64 size2 = rgn->region[r2].size; + if (memblock.reserved.regions == memblock_reserved_init_regions) + return 0; - return memblock_addrs_adjacent(base1, size1, base2, size2); + return memblock_reserve(__pa(memblock.reserved.regions), + sizeof(struct memblock_region) * memblock.reserved.max); } -static void memblock_remove_region(struct memblock_region *rgn, unsigned long r) +static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) { unsigned long i; - for (i = r; i < rgn->cnt - 1; i++) { - rgn->region[i].base = rgn->region[i + 1].base; - rgn->region[i].size = rgn->region[i + 1].size; + for (i = r; i < type->cnt - 1; i++) { + type->regions[i].base = type->regions[i + 1].base; + type->regions[i].size = type->regions[i + 1].size; } - rgn->cnt--; + type->cnt--; } /* Assumption: base addr of region 1 < base addr of region 2 */ -static void memblock_coalesce_regions(struct memblock_region *rgn, +static void __init_memblock memblock_coalesce_regions(struct memblock_type *type, unsigned long r1, unsigned long r2) { - rgn->region[r1].size += rgn->region[r2].size; - memblock_remove_region(rgn, r2); + type->regions[r1].size += type->regions[r2].size; + memblock_remove_region(type, r2); } -void __init memblock_init(void) +/* Defined below but needed now */ +static long memblock_add_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size); + +static int __init_memblock memblock_double_array(struct memblock_type *type) { - /* Create a dummy zero size MEMBLOCK which will get coalesced away later. - * This simplifies the memblock_add() code below... + struct memblock_region *new_array, *old_array; + phys_addr_t old_size, new_size, addr; + int use_slab = slab_is_available(); + + /* We don't allow resizing until we know about the reserved regions + * of memory that aren't suitable for allocation */ - memblock.memory.region[0].base = 0; - memblock.memory.region[0].size = 0; - memblock.memory.cnt = 1; + if (!memblock_can_resize) + return -1; - /* Ditto. */ - memblock.reserved.region[0].base = 0; - memblock.reserved.region[0].size = 0; - memblock.reserved.cnt = 1; -} + /* Calculate new doubled size */ + old_size = type->max * sizeof(struct memblock_region); + new_size = old_size << 1; + + /* Try to find some space for it. + * + * WARNING: We assume that either slab_is_available() and we use it or + * we use MEMBLOCK for allocations. That means that this is unsafe to use + * when bootmem is currently active (unless bootmem itself is implemented + * on top of MEMBLOCK which isn't the case yet) + * + * This should however not be an issue for now, as we currently only + * call into MEMBLOCK while it's still active, or much later when slab is + * active for memory hotplug operations + */ + if (use_slab) { + new_array = kmalloc(new_size, GFP_KERNEL); + addr = new_array == NULL ? MEMBLOCK_ERROR : __pa(new_array); + } else + addr = memblock_find_base(new_size, sizeof(phys_addr_t), 0, MEMBLOCK_ALLOC_ACCESSIBLE); + if (addr == MEMBLOCK_ERROR) { + pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", + memblock_type_name(type), type->max, type->max * 2); + return -1; + } + new_array = __va(addr); -void __init memblock_analyze(void) -{ - int i; + memblock_dbg("memblock: %s array is doubled to %ld at [%#010llx-%#010llx]", + memblock_type_name(type), type->max * 2, (u64)addr, (u64)addr + new_size - 1); - memblock.memory.size = 0; + /* Found space, we now need to move the array over before + * we add the reserved region since it may be our reserved + * array itself that is full. + */ + memcpy(new_array, type->regions, old_size); + memset(new_array + type->max, 0, old_size); + old_array = type->regions; + type->regions = new_array; + type->max <<= 1; + + /* If we use SLAB that's it, we are done */ + if (use_slab) + return 0; - for (i = 0; i < memblock.memory.cnt; i++) - memblock.memory.size += memblock.memory.region[i].size; + /* Add the new reserved region now. Should not fail ! */ + BUG_ON(memblock_add_region(&memblock.reserved, addr, new_size) < 0); + + /* If the array wasn't our static init one, then free it. We only do + * that before SLAB is available as later on, we don't know whether + * to use kfree or free_bootmem_pages(). Shouldn't be a big deal + * anyways + */ + if (old_array != memblock_memory_init_regions && + old_array != memblock_reserved_init_regions) + memblock_free(__pa(old_array), old_size); + + return 0; } -static long memblock_add_region(struct memblock_region *rgn, u64 base, u64 size) +extern int __init_memblock __weak memblock_memory_can_coalesce(phys_addr_t addr1, phys_addr_t size1, + phys_addr_t addr2, phys_addr_t size2) +{ + return 1; +} + +static long __init_memblock memblock_add_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size) { unsigned long coalesced = 0; long adjacent, i; - if ((rgn->cnt == 1) && (rgn->region[0].size == 0)) { - rgn->region[0].base = base; - rgn->region[0].size = size; + if ((type->cnt == 1) && (type->regions[0].size == 0)) { + type->regions[0].base = base; + type->regions[0].size = size; return 0; } /* First try and coalesce this MEMBLOCK with another. */ - for (i = 0; i < rgn->cnt; i++) { - u64 rgnbase = rgn->region[i].base; - u64 rgnsize = rgn->region[i].size; + for (i = 0; i < type->cnt; i++) { + phys_addr_t rgnbase = type->regions[i].base; + phys_addr_t rgnsize = type->regions[i].size; if ((rgnbase == base) && (rgnsize == size)) /* Already have this region, so we're done */ return 0; adjacent = memblock_addrs_adjacent(base, size, rgnbase, rgnsize); + /* Check if arch allows coalescing */ + if (adjacent != 0 && type == &memblock.memory && + !memblock_memory_can_coalesce(base, size, rgnbase, rgnsize)) + break; if (adjacent > 0) { - rgn->region[i].base -= size; - rgn->region[i].size += size; + type->regions[i].base -= size; + type->regions[i].size += size; coalesced++; break; } else if (adjacent < 0) { - rgn->region[i].size += size; + type->regions[i].size += size; coalesced++; break; } } - if ((i < rgn->cnt - 1) && memblock_regions_adjacent(rgn, i, i+1)) { - memblock_coalesce_regions(rgn, i, i+1); + /* If we plugged a hole, we may want to also coalesce with the + * next region + */ + if ((i < type->cnt - 1) && memblock_regions_adjacent(type, i, i+1) && + ((type != &memblock.memory || memblock_memory_can_coalesce(type->regions[i].base, + type->regions[i].size, + type->regions[i+1].base, + type->regions[i+1].size)))) { + memblock_coalesce_regions(type, i, i+1); coalesced++; } if (coalesced) return coalesced; - if (rgn->cnt >= MAX_MEMBLOCK_REGIONS) + + /* If we are out of space, we fail. It's too late to resize the array + * but then this shouldn't have happened in the first place. + */ + if (WARN_ON(type->cnt >= type->max)) return -1; /* Couldn't coalesce the MEMBLOCK, so add it to the sorted table. */ - for (i = rgn->cnt - 1; i >= 0; i--) { - if (base < rgn->region[i].base) { - rgn->region[i+1].base = rgn->region[i].base; - rgn->region[i+1].size = rgn->region[i].size; + for (i = type->cnt - 1; i >= 0; i--) { + if (base < type->regions[i].base) { + type->regions[i+1].base = type->regions[i].base; + type->regions[i+1].size = type->regions[i].size; } else { - rgn->region[i+1].base = base; - rgn->region[i+1].size = size; + type->regions[i+1].base = base; + type->regions[i+1].size = size; break; } } - if (base < rgn->region[0].base) { - rgn->region[0].base = base; - rgn->region[0].size = size; + if (base < type->regions[0].base) { + type->regions[0].base = base; + type->regions[0].size = size; + } + type->cnt++; + + /* The array is full ? Try to resize it. If that fails, we undo + * our allocation and return an error + */ + if (type->cnt == type->max && memblock_double_array(type)) { + type->cnt--; + return -1; } - rgn->cnt++; return 0; } -long memblock_add(u64 base, u64 size) +long __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) { - struct memblock_region *_rgn = &memblock.memory; - - /* On pSeries LPAR systems, the first MEMBLOCK is our RMO region. */ - if (base == 0) - memblock.rmo_size = size; - - return memblock_add_region(_rgn, base, size); + return memblock_add_region(&memblock.memory, base, size); } -static long __memblock_remove(struct memblock_region *rgn, u64 base, u64 size) +static long __init_memblock __memblock_remove(struct memblock_type *type, phys_addr_t base, phys_addr_t size) { - u64 rgnbegin, rgnend; - u64 end = base + size; + phys_addr_t rgnbegin, rgnend; + phys_addr_t end = base + size; int i; rgnbegin = rgnend = 0; /* supress gcc warnings */ /* Find the region where (base, size) belongs to */ - for (i=0; i < rgn->cnt; i++) { - rgnbegin = rgn->region[i].base; - rgnend = rgnbegin + rgn->region[i].size; + for (i=0; i < type->cnt; i++) { + rgnbegin = type->regions[i].base; + rgnend = rgnbegin + type->regions[i].size; if ((rgnbegin <= base) && (end <= rgnend)) break; } /* Didn't find the region */ - if (i == rgn->cnt) + if (i == type->cnt) return -1; /* Check to see if we are removing entire region */ if ((rgnbegin == base) && (rgnend == end)) { - memblock_remove_region(rgn, i); + memblock_remove_region(type, i); return 0; } /* Check to see if region is matching at the front */ if (rgnbegin == base) { - rgn->region[i].base = end; - rgn->region[i].size -= size; + type->regions[i].base = end; + type->regions[i].size -= size; return 0; } /* Check to see if the region is matching at the end */ if (rgnend == end) { - rgn->region[i].size -= size; + type->regions[i].size -= size; return 0; } @@ -249,208 +435,189 @@ static long __memblock_remove(struct memblock_region *rgn, u64 base, u64 size) * We need to split the entry - adjust the current one to the * beginging of the hole and add the region after hole. */ - rgn->region[i].size = base - rgn->region[i].base; - return memblock_add_region(rgn, end, rgnend - end); + type->regions[i].size = base - type->regions[i].base; + return memblock_add_region(type, end, rgnend - end); } -long memblock_remove(u64 base, u64 size) +long __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) { return __memblock_remove(&memblock.memory, base, size); } -long __init memblock_free(u64 base, u64 size) +long __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) { return __memblock_remove(&memblock.reserved, base, size); } -long __init memblock_reserve(u64 base, u64 size) +long __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) { - struct memblock_region *_rgn = &memblock.reserved; + struct memblock_type *_rgn = &memblock.reserved; BUG_ON(0 == size); return memblock_add_region(_rgn, base, size); } -long memblock_overlaps_region(struct memblock_region *rgn, u64 base, u64 size) +phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) { - unsigned long i; + phys_addr_t found; - for (i = 0; i < rgn->cnt; i++) { - u64 rgnbase = rgn->region[i].base; - u64 rgnsize = rgn->region[i].size; - if (memblock_addrs_overlap(base, size, rgnbase, rgnsize)) - break; - } + /* We align the size to limit fragmentation. Without this, a lot of + * small allocs quickly eat up the whole reserve array on sparc + */ + size = memblock_align_up(size, align); - return (i < rgn->cnt) ? i : -1; + found = memblock_find_base(size, align, 0, max_addr); + if (found != MEMBLOCK_ERROR && + memblock_add_region(&memblock.reserved, found, size) >= 0) + return found; + + return 0; } -static u64 memblock_align_down(u64 addr, u64 size) +phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr) { - return addr & ~(size - 1); + phys_addr_t alloc; + + alloc = __memblock_alloc_base(size, align, max_addr); + + if (alloc == 0) + panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n", + (unsigned long long) size, (unsigned long long) max_addr); + + return alloc; } -static u64 memblock_align_up(u64 addr, u64 size) +phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align) { - return (addr + (size - 1)) & ~(size - 1); + return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE); } -static u64 __init memblock_alloc_nid_unreserved(u64 start, u64 end, - u64 size, u64 align) + +/* + * Additional node-local allocators. Search for node memory is bottom up + * and walks memblock regions within that node bottom-up as well, but allocation + * within an memblock region is top-down. XXX I plan to fix that at some stage + * + * WARNING: Only available after early_node_map[] has been populated, + * on some architectures, that is after all the calls to add_active_range() + * have been done to populate it. + */ + +phys_addr_t __weak __init memblock_nid_range(phys_addr_t start, phys_addr_t end, int *nid) { - u64 base, res_base; - long j; +#ifdef CONFIG_ARCH_POPULATES_NODE_MAP + /* + * This code originates from sparc which really wants use to walk by addresses + * and returns the nid. This is not very convenient for early_pfn_map[] users + * as the map isn't sorted yet, and it really wants to be walked by nid. + * + * For now, I implement the inefficient method below which walks the early + * map multiple times. Eventually we may want to use an ARCH config option + * to implement a completely different method for both case. + */ + unsigned long start_pfn, end_pfn; + int i; - base = memblock_align_down((end - size), align); - while (start <= base) { - j = memblock_overlaps_region(&memblock.reserved, base, size); - if (j < 0) { - /* this area isn't reserved, take it */ - if (memblock_add_region(&memblock.reserved, base, size) < 0) - base = ~(u64)0; - return base; - } - res_base = memblock.reserved.region[j].base; - if (res_base < size) - break; - base = memblock_align_down(res_base - size, align); + for (i = 0; i < MAX_NUMNODES; i++) { + get_pfn_range_for_nid(i, &start_pfn, &end_pfn); + if (start < PFN_PHYS(start_pfn) || start >= PFN_PHYS(end_pfn)) + continue; + *nid = i; + return min(end, PFN_PHYS(end_pfn)); } +#endif + *nid = 0; - return ~(u64)0; + return end; } -static u64 __init memblock_alloc_nid_region(struct memblock_property *mp, - u64 (*nid_range)(u64, u64, int *), - u64 size, u64 align, int nid) +static phys_addr_t __init memblock_alloc_nid_region(struct memblock_region *mp, + phys_addr_t size, + phys_addr_t align, int nid) { - u64 start, end; + phys_addr_t start, end; start = mp->base; end = start + mp->size; start = memblock_align_up(start, align); while (start < end) { - u64 this_end; + phys_addr_t this_end; int this_nid; - this_end = nid_range(start, end, &this_nid); + this_end = memblock_nid_range(start, end, &this_nid); if (this_nid == nid) { - u64 ret = memblock_alloc_nid_unreserved(start, this_end, - size, align); - if (ret != ~(u64)0) + phys_addr_t ret = memblock_find_region(start, this_end, size, align); + if (ret != MEMBLOCK_ERROR && + memblock_add_region(&memblock.reserved, ret, size) >= 0) return ret; } start = this_end; } - return ~(u64)0; + return MEMBLOCK_ERROR; } -u64 __init memblock_alloc_nid(u64 size, u64 align, int nid, - u64 (*nid_range)(u64 start, u64 end, int *nid)) +phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) { - struct memblock_region *mem = &memblock.memory; + struct memblock_type *mem = &memblock.memory; int i; BUG_ON(0 == size); + /* We align the size to limit fragmentation. Without this, a lot of + * small allocs quickly eat up the whole reserve array on sparc + */ size = memblock_align_up(size, align); + /* We do a bottom-up search for a region with the right + * nid since that's easier considering how memblock_nid_range() + * works + */ for (i = 0; i < mem->cnt; i++) { - u64 ret = memblock_alloc_nid_region(&mem->region[i], - nid_range, + phys_addr_t ret = memblock_alloc_nid_region(&mem->regions[i], size, align, nid); - if (ret != ~(u64)0) + if (ret != MEMBLOCK_ERROR) return ret; } - return memblock_alloc(size, align); -} - -u64 __init memblock_alloc(u64 size, u64 align) -{ - return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ANYWHERE); + return 0; } -u64 __init memblock_alloc_base(u64 size, u64 align, u64 max_addr) +phys_addr_t __init memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) { - u64 alloc; - - alloc = __memblock_alloc_base(size, align, max_addr); + phys_addr_t res = memblock_alloc_nid(size, align, nid); - if (alloc == 0) - panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n", - (unsigned long long) size, (unsigned long long) max_addr); - - return alloc; + if (res) + return res; + return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ANYWHERE); } -u64 __init __memblock_alloc_base(u64 size, u64 align, u64 max_addr) -{ - long i, j; - u64 base = 0; - u64 res_base; - - BUG_ON(0 == size); - size = memblock_align_up(size, align); - - /* On some platforms, make sure we allocate lowmem */ - /* Note that MEMBLOCK_REAL_LIMIT may be MEMBLOCK_ALLOC_ANYWHERE */ - if (max_addr == MEMBLOCK_ALLOC_ANYWHERE) - max_addr = MEMBLOCK_REAL_LIMIT; - - for (i = memblock.memory.cnt - 1; i >= 0; i--) { - u64 memblockbase = memblock.memory.region[i].base; - u64 memblocksize = memblock.memory.region[i].size; - - if (memblocksize < size) - continue; - if (max_addr == MEMBLOCK_ALLOC_ANYWHERE) - base = memblock_align_down(memblockbase + memblocksize - size, align); - else if (memblockbase < max_addr) { - base = min(memblockbase + memblocksize, max_addr); - base = memblock_align_down(base - size, align); - } else - continue; - - while (base && memblockbase <= base) { - j = memblock_overlaps_region(&memblock.reserved, base, size); - if (j < 0) { - /* this area isn't reserved, take it */ - if (memblock_add_region(&memblock.reserved, base, size) < 0) - return 0; - return base; - } - res_base = memblock.reserved.region[j].base; - if (res_base < size) - break; - base = memblock_align_down(res_base - size, align); - } - } - return 0; -} +/* + * Remaining API functions + */ /* You must call memblock_analyze() before this. */ -u64 __init memblock_phys_mem_size(void) +phys_addr_t __init memblock_phys_mem_size(void) { - return memblock.memory.size; + return memblock.memory_size; } -u64 memblock_end_of_DRAM(void) +phys_addr_t __init_memblock memblock_end_of_DRAM(void) { int idx = memblock.memory.cnt - 1; - return (memblock.memory.region[idx].base + memblock.memory.region[idx].size); + return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); } /* You must call memblock_analyze() after this. */ -void __init memblock_enforce_memory_limit(u64 memory_limit) +void __init memblock_enforce_memory_limit(phys_addr_t memory_limit) { unsigned long i; - u64 limit; - struct memblock_property *p; + phys_addr_t limit; + struct memblock_region *p; if (!memory_limit) return; @@ -458,24 +625,21 @@ void __init memblock_enforce_memory_limit(u64 memory_limit) /* Truncate the memblock regions to satisfy the memory limit. */ limit = memory_limit; for (i = 0; i < memblock.memory.cnt; i++) { - if (limit > memblock.memory.region[i].size) { - limit -= memblock.memory.region[i].size; + if (limit > memblock.memory.regions[i].size) { + limit -= memblock.memory.regions[i].size; continue; } - memblock.memory.region[i].size = limit; + memblock.memory.regions[i].size = limit; memblock.memory.cnt = i + 1; break; } - if (memblock.memory.region[0].size < memblock.rmo_size) - memblock.rmo_size = memblock.memory.region[0].size; - memory_limit = memblock_end_of_DRAM(); /* And truncate any reserves above the limit also. */ for (i = 0; i < memblock.reserved.cnt; i++) { - p = &memblock.reserved.region[i]; + p = &memblock.reserved.regions[i]; if (p->base > memory_limit) p->size = 0; @@ -489,53 +653,190 @@ void __init memblock_enforce_memory_limit(u64 memory_limit) } } -int __init memblock_is_reserved(u64 addr) +static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) +{ + unsigned int left = 0, right = type->cnt; + + do { + unsigned int mid = (right + left) / 2; + + if (addr < type->regions[mid].base) + right = mid; + else if (addr >= (type->regions[mid].base + + type->regions[mid].size)) + left = mid + 1; + else + return mid; + } while (left < right); + return -1; +} + +int __init memblock_is_reserved(phys_addr_t addr) +{ + return memblock_search(&memblock.reserved, addr) != -1; +} + +int __init_memblock memblock_is_memory(phys_addr_t addr) +{ + return memblock_search(&memblock.memory, addr) != -1; +} + +int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) +{ + int idx = memblock_search(&memblock.reserved, base); + + if (idx == -1) + return 0; + return memblock.reserved.regions[idx].base <= base && + (memblock.reserved.regions[idx].base + + memblock.reserved.regions[idx].size) >= (base + size); +} + +int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) +{ + return memblock_overlaps_region(&memblock.reserved, base, size) >= 0; +} + + +void __init_memblock memblock_set_current_limit(phys_addr_t limit) { + memblock.current_limit = limit; +} + +static void __init_memblock memblock_dump(struct memblock_type *region, char *name) +{ + unsigned long long base, size; int i; - for (i = 0; i < memblock.reserved.cnt; i++) { - u64 upper = memblock.reserved.region[i].base + - memblock.reserved.region[i].size - 1; - if ((addr >= memblock.reserved.region[i].base) && (addr <= upper)) - return 1; + pr_info(" %s.cnt = 0x%lx\n", name, region->cnt); + + for (i = 0; i < region->cnt; i++) { + base = region->regions[i].base; + size = region->regions[i].size; + + pr_info(" %s[%#x]\t[%#016llx-%#016llx], %#llx bytes\n", + name, i, base, base + size - 1, size); } - return 0; } -int memblock_is_region_reserved(u64 base, u64 size) +void __init_memblock memblock_dump_all(void) { - return memblock_overlaps_region(&memblock.reserved, base, size) >= 0; + if (!memblock_debug) + return; + + pr_info("MEMBLOCK configuration:\n"); + pr_info(" memory size = 0x%llx\n", (unsigned long long)memblock.memory_size); + + memblock_dump(&memblock.memory, "memory"); + memblock_dump(&memblock.reserved, "reserved"); } -/* - * Given a <base, len>, find which memory regions belong to this range. - * Adjust the request and return a contiguous chunk. - */ -int memblock_find(struct memblock_property *res) +void __init memblock_analyze(void) { int i; - u64 rstart, rend; - rstart = res->base; - rend = rstart + res->size - 1; + /* Check marker in the unused last array entry */ + WARN_ON(memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS].base + != (phys_addr_t)RED_INACTIVE); + WARN_ON(memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS].base + != (phys_addr_t)RED_INACTIVE); + + memblock.memory_size = 0; + + for (i = 0; i < memblock.memory.cnt; i++) + memblock.memory_size += memblock.memory.regions[i].size; + + /* We allow resizing from there */ + memblock_can_resize = 1; +} + +void __init memblock_init(void) +{ + static int init_done __initdata = 0; + + if (init_done) + return; + init_done = 1; + + /* Hookup the initial arrays */ + memblock.memory.regions = memblock_memory_init_regions; + memblock.memory.max = INIT_MEMBLOCK_REGIONS; + memblock.reserved.regions = memblock_reserved_init_regions; + memblock.reserved.max = INIT_MEMBLOCK_REGIONS; + + /* Write a marker in the unused last array entry */ + memblock.memory.regions[INIT_MEMBLOCK_REGIONS].base = (phys_addr_t)RED_INACTIVE; + memblock.reserved.regions[INIT_MEMBLOCK_REGIONS].base = (phys_addr_t)RED_INACTIVE; + + /* Create a dummy zero size MEMBLOCK which will get coalesced away later. + * This simplifies the memblock_add() code below... + */ + memblock.memory.regions[0].base = 0; + memblock.memory.regions[0].size = 0; + memblock.memory.cnt = 1; + + /* Ditto. */ + memblock.reserved.regions[0].base = 0; + memblock.reserved.regions[0].size = 0; + memblock.reserved.cnt = 1; + + memblock.current_limit = MEMBLOCK_ALLOC_ANYWHERE; +} + +static int __init early_memblock(char *p) +{ + if (p && strstr(p, "debug")) + memblock_debug = 1; + return 0; +} +early_param("memblock", early_memblock); + +#if defined(CONFIG_DEBUG_FS) && !defined(ARCH_DISCARD_MEMBLOCK) + +static int memblock_debug_show(struct seq_file *m, void *private) +{ + struct memblock_type *type = m->private; + struct memblock_region *reg; + int i; + + for (i = 0; i < type->cnt; i++) { + reg = &type->regions[i]; + seq_printf(m, "%4d: ", i); + if (sizeof(phys_addr_t) == 4) + seq_printf(m, "0x%08lx..0x%08lx\n", + (unsigned long)reg->base, + (unsigned long)(reg->base + reg->size - 1)); + else + seq_printf(m, "0x%016llx..0x%016llx\n", + (unsigned long long)reg->base, + (unsigned long long)(reg->base + reg->size - 1)); - for (i = 0; i < memblock.memory.cnt; i++) { - u64 start = memblock.memory.region[i].base; - u64 end = start + memblock.memory.region[i].size - 1; - - if (start > rend) - return -1; - - if ((end >= rstart) && (start < rend)) { - /* adjust the request */ - if (rstart < start) - rstart = start; - if (rend > end) - rend = end; - res->base = rstart; - res->size = rend - rstart + 1; - return 0; - } } - return -1; + return 0; +} + +static int memblock_debug_open(struct inode *inode, struct file *file) +{ + return single_open(file, memblock_debug_show, inode->i_private); } + +static const struct file_operations memblock_debug_fops = { + .open = memblock_debug_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int __init memblock_init_debugfs(void) +{ + struct dentry *root = debugfs_create_dir("memblock", NULL); + if (!root) + return -ENXIO; + debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops); + debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops); + + return 0; +} +__initcall(memblock_init_debugfs); + +#endif /* CONFIG_DEBUG_FS */ diff --git a/mm/page_alloc.c b/mm/page_alloc.c index f12ad1836abe..2a362c52fdf4 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -21,6 +21,7 @@ #include <linux/pagemap.h> #include <linux/jiffies.h> #include <linux/bootmem.h> +#include <linux/memblock.h> #include <linux/compiler.h> #include <linux/kernel.h> #include <linux/kmemcheck.h> @@ -3636,6 +3637,41 @@ void __init free_bootmem_with_active_regions(int nid, } } +#ifdef CONFIG_HAVE_MEMBLOCK +u64 __init find_memory_core_early(int nid, u64 size, u64 align, + u64 goal, u64 limit) +{ + int i; + + /* Need to go over early_node_map to find out good range for node */ + for_each_active_range_index_in_nid(i, nid) { + u64 addr; + u64 ei_start, ei_last; + u64 final_start, final_end; + + ei_last = early_node_map[i].end_pfn; + ei_last <<= PAGE_SHIFT; + ei_start = early_node_map[i].start_pfn; + ei_start <<= PAGE_SHIFT; + + final_start = max(ei_start, goal); + final_end = min(ei_last, limit); + + if (final_start >= final_end) + continue; + + addr = memblock_find_in_range(final_start, final_end, size, align); + + if (addr == MEMBLOCK_ERROR) + continue; + + return addr; + } + + return MEMBLOCK_ERROR; +} +#endif + int __init add_from_early_node_map(struct range *range, int az, int nr_range, int nid) { @@ -3655,46 +3691,26 @@ int __init add_from_early_node_map(struct range *range, int az, void * __init __alloc_memory_core_early(int nid, u64 size, u64 align, u64 goal, u64 limit) { - int i; void *ptr; + u64 addr; - if (limit > get_max_mapped()) - limit = get_max_mapped(); - - /* need to go over early_node_map to find out good range for node */ - for_each_active_range_index_in_nid(i, nid) { - u64 addr; - u64 ei_start, ei_last; - - ei_last = early_node_map[i].end_pfn; - ei_last <<= PAGE_SHIFT; - ei_start = early_node_map[i].start_pfn; - ei_start <<= PAGE_SHIFT; - addr = find_early_area(ei_start, ei_last, - goal, limit, size, align); - - if (addr == -1ULL) - continue; + if (limit > memblock.current_limit) + limit = memblock.current_limit; -#if 0 - printk(KERN_DEBUG "alloc (nid=%d %llx - %llx) (%llx - %llx) %llx %llx => %llx\n", - nid, - ei_start, ei_last, goal, limit, size, - align, addr); -#endif + addr = find_memory_core_early(nid, size, align, goal, limit); - ptr = phys_to_virt(addr); - memset(ptr, 0, size); - reserve_early_without_check(addr, addr + size, "BOOTMEM"); - /* - * The min_count is set to 0 so that bootmem allocated blocks - * are never reported as leaks. - */ - kmemleak_alloc(ptr, size, 0, 0); - return ptr; - } + if (addr == MEMBLOCK_ERROR) + return NULL; - return NULL; + ptr = phys_to_virt(addr); + memset(ptr, 0, size); + memblock_x86_reserve_range(addr, addr + size, "BOOTMEM"); + /* + * The min_count is set to 0 so that bootmem allocated blocks + * are never reported as leaks. + */ + kmemleak_alloc(ptr, size, 0, 0); + return ptr; } #endif diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c index aa33fd67fa41..29d6cbffb283 100644 --- a/mm/sparse-vmemmap.c +++ b/mm/sparse-vmemmap.c @@ -220,18 +220,7 @@ void __init sparse_mem_maps_populate_node(struct page **map_map, if (vmemmap_buf_start) { /* need to free left buf */ -#ifdef CONFIG_NO_BOOTMEM - free_early(__pa(vmemmap_buf_start), __pa(vmemmap_buf_end)); - if (vmemmap_buf_start < vmemmap_buf) { - char name[15]; - - snprintf(name, sizeof(name), "MEMMAP %d", nodeid); - reserve_early_without_check(__pa(vmemmap_buf_start), - __pa(vmemmap_buf), name); - } -#else free_bootmem(__pa(vmemmap_buf), vmemmap_buf_end - vmemmap_buf); -#endif vmemmap_buf = NULL; vmemmap_buf_end = NULL; } |